It almost sounds like something along the lines of this--
<
http://www.slac.stanford.edu/exp/mps/FCS/FCS_drop.htm>
If you had access to some glassblowing equipement it would
be possible to build something as is mentioned above. You would
also need the appropriate piezoelectric element.
I have found a few designs like this used in a university environment,
but descriptions are few and far between.